Will this work with EarStudio ES100-24bit Portable High-Resolution Bluetooth Receiver/USB DAC/Headphone Amp with LDAC, aptX HD, aptX, AAC (3.5mm Unbalanced & 2.5mm Balanced)? I would like to be able to walk around my house with these headphones on. Thanks!

Yes with the 3.5mm just remove the 6.3mm plug on the 6xx and it works. Although you probably would be able to get the full potential out of this headphone with your phone if it still has a headphone jack. or usbc to headphone jack. If it gets loud enough it's more than enough.

Folks, I'm a dipshit and knocked these things off my desk onto my floor. I don't think any damage was done to the super important parts, but the left cup doesn't freely rotate like it should. This seems to be the one part of these things that can't be taken apart, and Sennheiser themselves don't seem to sell replacements anymore, so kill me please

Finally the HD6XX arrived 3 days ago, I've been waiting a long time to try these out.
Specially after all what ive read out there about them and form what people around me say..
"why don't you try Sennheisers?" is the absolutely most annoying question that people ask me over and over again.
I haven't tried many headphones, what I can remember now from my collection is:
B&W P5
B&W P7
JVC HA-SZ2000
RHA IME (few ones)
Audeze EL-8 Closed Back
What stuck most with me are the El-8. They sound freaking god! Crisp, super crisp and with the right headphone amplifier you will push these with amazing bass response.
But they are heavy.. sensitive if to loud and closed back, open back is open back and no closed headphone can compete according to me.
So now I have the Hd6XX and directly I plugged it to my iFi iDSD Black. And wow!
They sound different. I checked lots on the discussions thread here and saw that many mention they are bright, and that surprised me when I listened to them. They are not bright! :/
Have you guys ever tried the EL-8? HAHA they are bright!
What I directly understood is that 6xx don't like to much power from the iDSD Black. So I switch to my Schiit Lyr 2 (stock tubes) and again W O W! these headphones move and they sounds great.
Actually the only headphones that made me go wow are the EL-8 since they are the most fancy headphones ive tried and own. So did these Hd6xx. Love mids and lows.
Give these headphone a try with Spoiler - Hyper. Blows away many headphones!!
So to all you people who nagged me to try out Sennheiser, Thank you! :)
Absolutely my favorite headphone now!

Hey everyone,
Just thought I'd put this out there. Make sure you really put these headphones through their paces as soon as you get them.
I ordered these HD 6XXs a while back and received my pair around Christmas time 2017. I gave them a quick listen and then boxed them up as backups to theHD 650s I've had for years.
A few days ago I decided to get them out of storage and put them into my primary rotation. Shortly thereafter I noticed that the right side crackles when things get loud or there's a lot of bass.
Make sure you really test them out as soon as you get them. Some of them seem to be shipping with issues.

I am kind worried about headphone with no return policy in general. In fact, HD600/650 is around $200 on Amazon for a long time before Massdrop announced the 6xx, I brought one at $200 on Amazon with prime and returned since I don't like the vailed tone few years ago. It's a good headphone but definitely not for everyone.

Could somebody help to choose between hd6xx, akg-k7xx and HIFIMAN HE4XX, I mostly listen to music for around 5-7 hours in the work and then ill use them to play some games while listening to music), also I need them to not touch any of my lower cartilage as my ear is pretty damaged for the extensive use (don't know if the hd6xx will accomplish this), don't really care for movies/tv sound
Thanks in advance

Do these ship with balanced cables? I'm having trouble finding a concrete answer. Otherwise, I'm looking at the Periapt Cable: Type 4 - Dual 2 pin Senn HD Series
Which I believe are balanced cables. Frankly, I don't even know what balanced cables do, but I see a lot of talk about them so am considering trying them out.
thanks in advance.

Balanced cables cancel out outside interference and noise that regular cables can pickup from things like cell phones, generators, noisy power supplies, ect. They also cancel out any microphonic effects the cables might have. Both the devices on either end of a balanced cable must also support the ACTIVE signal processing balanced cables require. However they will not do anything to filter noise picked by your headphone amp or DAC, regardless of the source.
Most headphone ''''''''balanced'''''''' cables aren't truely balanced in the traditional sense but just have seperate shielding for each wire and some extra grounding, which can be better then regular cables. To be honest, with runs as short as headphone cables I'd be surprised if it made a noticeable differance unless you use your headphones next to a transformer.

These ship with a non balanced cable but as far as I know the wire these ship with have separate ground wired for each cup so if you can do a little work then go ahead and buy a 4 pin xlr connector , chop the 3.5 mm jack off and resolder the 4 wires onto the xlr connector. This will give you a balanced xlr cable which then you can buy a bunch of convertors for like xlr to 6.5mm , xlr to 4.4 pentacon, xlr to 3.5mm so that you can plug it even in a non balanced amp.
This guy chopped the cable , made one side male xlr , other side female xlr .
https://m.imgur.com/a/Kas3H

Hey guys, first time posting. I just joined the Dark Voice drop and was thinking about getting these. I already have a Sennheiser HD 595 and those are my most used cans. Do these blow those out the water? I have have the ATH M50, Grado SR-80, and AKG 712 (white ones, I’m forgetting the model off the top of my head). Would the DV work well with what I have? For tubes, any recs? The Tung Sol mouse ears and 7236 seem to be recommended. Anything else? Thank you!

Mostly true. They will still "work" on a regular onboard audio/sound card headphone jack, but you will definitely not be driving them to their potential, missing out on the details and dynamics the HD6XX can offer. A DAC & amp is definitely recommended for these headphones if you truly want to hear what the HD6XX is capable of.

Audio noob here. Just picked up HD6xxx's and THX AAA 789 and the pair sounds fantastic but unless I max the gain knob they just simply don't get loud enough. I have a Sennheiser GSX 1000 gaming dac that I can output via 3.5 jack to rca or Scarlett 2i2 interface via balanced 1/4 to xlr to the 789 but don't have balanced cables for my HD6xxx.
Debating on spending $70 on periapt cables for balanced output or $110 on a FiiO K3 amp to add to the equation but I don't know if it would diminish the quality running to the K3 to my 789 then to my headphones. Leaning towards the K3 though because I also have Audio-Technica ATH-AD700x's that I really like to use for some metal cause the drums sound so sick so I would benefit from the slight bass boost with the K3 as well. Thoughts? Would it be stupid to run from K3 to 789? Or is the balanced cable for the better headphones the better option? Appreciate it!!

I just plunged in to this drop (pardon the pun)! I have a quick question. I also have the THS AAA 789, which offers a balanced out. Is there an affordable balanced cable that one can use with the HD 6XX?

Oh. Totally worth the wait! It really is amazing. I asked about the XLR only because unless I am hallucinating it does make my other phones sound tangibly better. However, I am struggling for some form of external corroboration to confirm that I am not hallucinating!

I Just ordered these and am looking at what I should use to power them on my Galaxy Note 8. I use Tidal and have been looking at the AudioQuest Dragonfly Red for its MQA support. Is that a good choice? I will mostly be using this at the office and maybe occasionally on my desktop or laptop at home as well.

It all depends on your use patterns. If you think you are going listen while on the move, there is nothing to beat the AQ DF Red. I have one of those, and they are fantastic. However, I have not listened to them with the HD 6XX, which I have not received yet. Just looking at the specs, I'd hazard that they might be a tad underpowered for these phones, but I can be wrong. If you are open to a more desktop operation, then many of the other options -- e.g., those by Topping, or the SDAC in combination with a decent Amp, will give you more bang for the buck.

Portable- topping nx4 DSD .
Desktop -
schiit stack ( magni, modi)
Topping d30 , a30.
Topping Dx3 pro.
JDS labs atom (amp only) pair it with any good DAC like the smsl su8. At 249 its costly but worth it.
JDS labs el stack is also very good.
Xduoo tube amp DAC combos are petty cheap and really powerful.
Since you are new I wouldn't suggest you the darkvoice (even though the hd6xx pairs with it nicely) since the dark voice needs tube rolling.
For more recommendations , visit z reviews subreddit for his guide on amp , DAC and combos.

My sense, having heard the 650s, is that these headphones will do well with anything -- but a more powerful amp will really make it sing. I am looking forward to pairing it with my THX AAA, which I really love. But I am hearing great things about the Felinks Echo, and have my eye on one of those for the future, just to explore the Tube world a bit, not to mention its dashing good looks. As for a DAC,I think you'll really need to spend considerably more to beat the MD Grace ZDAC. It is really amazing. Really.

Anyone found some replacement/aftermarket ear pads that are thicker I guess you would say? I like the feel and cushioning of the stock pads but after prolonged use my ears touch and rub agaisnt the inner grills if the pads where just a little thicker I wouldn't have to take them off after they start to hurt.

Since MD won't ship to Canada via USPS (which would be a lot better for their customers), you are pretty much guaranteed to be paying all kinds inflated/bogus charges that courier companies charge, as well as taxes which may be technically accurate, but that in actual practice Customs would sometimes choose via their discretion not to charge if it was left up to them (although even with that being true, usually they wouldn't let an item that is over $100 slide on the taxes). Whereas the couriers MD uses will assume that Customs would have charged taxes 100% of the time, and so the couriers will always charge you every cent of those taxes.
I live in Canada and when I bought LSR 30X from MD a long time ago, MD shipped the speakers in one box and the ~$5 USD cable that came with the product in another box that was shipped separately. The ~$5 USD cable ended up costing me about $40 CAD worth of invalid taxes and other bogus charges which I had to pay so that the post office would release the parcel to me. At the time, I didn't know that parcel merely had the cable inside it, as I had purchased a $200 USD DAC at the same time and I thought the DAC was inside that box. So thanks to these appaling shenanigans, I ended up paying ~$40 CAD for a ~$5 USD cable. If I had known the cable was in the box, then I would have refused the parcel rather than let myself be scammed. And the reason the Post Office charged me such a high amount of money was because either MD itself or the courier MD hired didn't list the value of the cable as its accuarate and true value (i.e. $5 USD). Rather, they listed the cable value falsely as having a value of the purchase price which I paid for the speakers themselves (which were about $280 USD...and for which I also had to pay the ~$40 charges again, a second time, in order to receive the parcel that contained the speakers).
So, I advise everyone to beware of the trumped-up charges that will probably be coming your way whenever you buy anything from MD that ships to Canada.